//package org.qiyu.live.gateway.XssFilter;
//
//import cn.hutool.http.HtmlUtil;
//import io.netty.buffer.ByteBufAllocator;
//import org.slf4j.Logger;
//import org.slf4j.LoggerFactory;
//import org.springframework.beans.factory.annotation.Autowired;
//import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
//import org.springframework.cloud.gateway.filter.GatewayFilterChain;
//import org.springframework.cloud.gateway.filter.GlobalFilter;
//import org.springframework.core.Ordered;
//import org.springframework.core.io.buffer.*;
//import org.springframework.http.HttpHeaders;
//import org.springframework.http.HttpMethod;
//import org.springframework.http.server.reactive.ServerHttpRequest;
//import org.springframework.http.server.reactive.ServerHttpRequestDecorator;
//import org.springframework.stereotype.Component;
//import org.springframework.web.server.ServerWebExchange;
//import reactor.core.publisher.Flux;
//import reactor.core.publisher.Mono;
//
//import java.nio.charset.StandardCharsets;
//
///**
// * 跨站脚本过滤器
// *
// * @author ruoyi
// */
//@Component
//@ConditionalOnProperty(value = "security.xss.enabled", havingValue = "true")
//public class XssFilter implements GlobalFilter, Ordered {
//    private static final Logger logger = LoggerFactory.getLogger(XssFilter.class);
//    // 跨站脚本的 xss 配置，nacos自行添加
//    @Autowired
//    private XssProperties xss;
//
//    @Override
//    public Mono<Void> filter(ServerWebExchange exchange, GatewayFilterChain chain) {
//        ServerHttpRequest request = exchange.getRequest();
//        // GET DELETE 不过滤
//        HttpMethod method = request.getMethod();
//        logger.info("GET DELETE 请求不过滤:{}",method);
//        if (method == null || method == HttpMethod.GET || method == HttpMethod.DELETE) {
//            return chain.filter(exchange);
//        }
//        // 非json类型，不过滤
//        if (!JsonUtils.isJsonRequest(exchange)) {
//            return chain.filter(exchange);
//        }
//        // excludeUrls 不过滤
//        String url = request.getURI().getPath();
////        if (StringUtils.matches(url, xss.getExcludeUrls())) {
////            return chain.filter(exchange);
////        }
//        //盲猜 这个是判断是否包含
//        if (xss.getExcludeUrls().contains(url)) {
//            return chain.filter(exchange);
//        }
//        ServerHttpRequestDecorator httpRequestDecorator = requestDecorator(exchange);
//        return chain.filter(exchange.mutate().request(httpRequestDecorator).build());
//
//    }
//
//    private ServerHttpRequestDecorator requestDecorator(ServerWebExchange exchange) {
//        ServerHttpRequestDecorator serverHttpRequestDecorator = new ServerHttpRequestDecorator(exchange.getRequest()) {
//            @Override
//            public Flux<DataBuffer> getBody() {
//                Flux<DataBuffer> body = super.getBody();
//                return body.buffer().map(dataBuffers -> {
//                    DataBufferFactory dataBufferFactory = new DefaultDataBufferFactory();
//                    DataBuffer join = dataBufferFactory.join(dataBuffers);
//                    byte[] content = new byte[join.readableByteCount()];
//                    join.read(content);
//                    DataBufferUtils.release(join);
//                    String bodyStr = new String(content, StandardCharsets.UTF_8);
//                    // 防xss攻击过滤
//                    bodyStr = HtmlUtil.cleanHtmlTag(bodyStr);
//                    // 转成字节
//                    byte[] bytes = bodyStr.getBytes();
//                    NettyDataBufferFactory nettyDataBufferFactory = new NettyDataBufferFactory(ByteBufAllocator.DEFAULT);
//                    DataBuffer buffer = nettyDataBufferFactory.allocateBuffer(bytes.length);
//                    buffer.write(bytes);
//                    return buffer;
//                });
//            }
//
//            @Override
//            public HttpHeaders getHeaders() {
//                HttpHeaders httpHeaders = new HttpHeaders();
//                httpHeaders.putAll(super.getHeaders());
//                // 由于修改了请求体的body，导致content-length长度不确定，因此需要删除原先的content-length
//                httpHeaders.remove(HttpHeaders.CONTENT_LENGTH);
//                httpHeaders.set(HttpHeaders.TRANSFER_ENCODING, "chunked");
//                return httpHeaders;
//            }
//
//        };
//        return serverHttpRequestDecorator;
//    }
//
//    @Override
//    public int getOrder() {
//        return Ordered.HIGHEST_PRECEDENCE;
//    }
//}
//
